ICD-10-CM
- Cabergoline
- Cacodyl, cacodylic acid
- Cactinomycin
- Cade oil
- Cadexomer iodine
- Cadmium (chloride) (fumes) (oxide)
- Cadralazine
- Caffeine
- Calabar bean
- Caladium seguinum
- Calamine (lotion)
- Calcifediol
- Calciferol
- Calcitonin
- Calcitriol
- Calcium
- Calculus-dissolving drug
- Calomel
- Caloric agent
- Calusterone
- Camazepam
- Camomile
- Camoquin
- Camphor
- Camylofin
- Cancer chemotherapy drug regimen
- Candeptin
- Candicidin
- Cannabinoids, synthetic
- Cannabinol
- Cannabis (derivatives)
- Canned heat
- Canrenoic acid
- Canrenone
- Cantharides, cantharidin, cantharis
- Canthaxanthin
- Capillary-active drug NEC
- Capreomycin
- Capsicum
- Captafol
- Captan
- Captodiame, captodiamine
- Captopril
- Caramiphen
- Carazolol
- Carbachol
- Carbacrylamine (resin)
- Carbamate (insecticide)
- Carbamate (sedative)
- Carbamazepine
- Carbamide
- Carbamylcholine chloride
- Carbaril
- Carbarsone
- Carbaryl
- Carbaspirin
- Carbazochrome (salicylate) (sodium sulfonate)
- Carbenicillin
- Carbenoxolone
- Carbetapentane
- Carbethyl salicylate
- Carbidopa (with levodopa)
- Carbimazole
- Carbinol
- Carbinoxamine
- Carbiphene
- Carbitol
- Carbocaine
- Carbocisteine
- Carbocromen
- Carbol fuchsin
- Carbolic acid
- Carbolonium (bromide)
- Carbo medicinalis
- Carbomycin
- Carbon
- Carbonic acid gas
- Carbophenothion
- Carboplatin
- Carboprost
- Carboquone
- Carbowax
- Carboxymethyl-cellulose
- Carbrital
- Carbromal
- Carbutamide
- Carbuterol
- Cardiac
- Cardiografin
- Cardio-green
- Cardiotonic (glycoside) NEC
- Cardiovascular drug NEC
- Cardrase
- Carfecillin
- Carfenazine
- Carfusin
- Carindacillin
- Carisoprodol
- Carmellose
- Carminative
- Carmofur
- Carmustine
- Carotene
- Carphenazine
- Carpipramine
- Carprofen
- Carpronium chloride
- Carrageenan
- Carteolol
- Carter's Little Pills
- Cascara (sagrada)
- Cassava
- Castellani's paint
- Castor
- Catalase
- Caterpillar (sting)
- Catha (edulis) (tea)
- Cathartic NEC
- Cathine
- Cathomycin
- Cation exchange resin
- Caustic (s) NEC
- Ceepryn
- Cefacetrile
- Cefaclor
- Cefadroxil
- Cefalexin
- Cefaloglycin
- Cefaloridine
- Cefalosporins
- Cefalotin
- Cefamandole
- Cefamycin antibiotic
- Cefapirin
- Cefatrizine
- Cefazedone
- Cefazolin
- Cefbuperazone
- Cefetamet
- Cefixime
- Cefmenoxime
- Cefmetazole
- Cefminox
- Cefonicid
- Cefoperazone
- Ceforanide
- Cefotaxime
- Cefotetan
- Cefotiam
- Cefoxitin
- Cefpimizole
- Cefpiramide
- Cefradine
- Cefroxadine
- Cefsulodin
- Ceftazidime
- Cefteram
- Ceftezole
- Ceftizoxime
- Ceftriaxone
- Cefuroxime
- Cefuzonam
- Celestone
- Celiprolol
- Cellosolve
- Cell stimulants and proliferants
- Cellulose
- Centipede (bite)
- Central nervous system
- Cephalexin
- Cephaloglycin
- Cephaloridine
- Cephalosporins
- Cephalothin
- Cephalotin
- Cephradine
- Cerbera (odallam)
- Cerberin
- Cerebral stimulants
- Cerium oxalate
- Cerous oxalate
- Ceruletide
- Cetalkonium (chloride)
- Cethexonium chloride
- Cetiedil
- Cetirizine
- Cetomacrogol
- Cetotiamine
- Cetoxime
- Cetraxate
- Cetrimide
- Cetrimonium (bromide)
- Cetylpyridinium chloride
- Cevadilla
- Cevitamic acid
- Ch'an su
- Chalk, precipitated
- Chamomile
- Charcoal
- Chaulmosulfone
- Chelating agent NEC
- Chelidonium majus
- Chemical substance NEC
- Chenodeoxycholic acid
- Chenodiol
- Chenopodium
- Cherry laurel
- Chinidin (e)
- Chiniofon
- Chlophedianol
- Chloral
- Chloralamide
- Chloralodol
- Chloralose
- Chlorambucil
- Chloramine
- Chloramphenicol
- Chlorate (potassium) (sodium) NEC
- Chlorazanil
- Chlorbenzene, chlorbenzol
- Chlorbenzoxamine
- Chlorbutol
- Chlorcyclizine
- Chlordan (e) (dust)
- Chlordantoin
- Chlordiazepoxide
- Chlordiethyl benzamide
- Chloresium
- Chlorethiazol
- Chlorethyl
- Chloretone
- Chlorex
- Chlorfenvinphos
- Chlorhexadol
- Chlorhexamide
- Chlorhexidine
- Chlorhydroxyquinolin
- Chloride of lime (bleach)
- Chlorimipramine
- Chlorinated
- Chlorine (fumes) (gas)
- Chlorisondamine chloride
- Chlormadinone
- Chlormephos
- Chlormerodrin
- Chlormethiazole
- Chlormethine
- Chlormethylenecycline
- Chlormezanone
- Chloroacetic acid
- Chloroacetone
- Chloroacetophenone
- Chloroaniline
- Chlorobenzene, chlorobenzol
- Chlorobromomethane (fire extinguisher)
- Chlorobutanol
- Chlorocresol
- Chlorodehydro-methyltestosterone
- Chlorodinitrobenzene
- Chlorodiphenyl
- Chloroethane
- Chloroethylene
- Chlorofluorocarbons
- Chloroform (fumes) (vapor)
- Chloroguanide
- Chloromycetin
- Chloronitrobenzene
- Chlorophacinone
- Chlorophenol
- Chlorophenothane
- Chlorophyll
- Chloropicrin (fumes)
- Chloroprocaine
- Chloroptic
- Chloropurine
- Chloropyramine
- Chloropyrifos
- Chloropyrilene
- Chloroquine
- Chlorothalonil
- Chlorothen
- Chlorothiazide
- Chlorothymol
- Chlorotrianisene
- Chlorovinyldichloro-arsine, not in war
- Chloroxine
- Chloroxylenol
- Chlorphenamine
- Chlorphenesin
- Chlorpheniramine
- Chlorphenoxamine
- Chlorphentermine
- Chlorprocaine
- Chlorproguanil
- Chlorpromazine
- Chlorpropamide
- Chlorprothixene
- Chlorquinaldol
- Chlorquinol
- Chlortalidone
- Chlortetracycline
- Chlorthalidone
- Chlorthion
- Chlorthiophos
- Chlortrianisene
- Chlor-Trimeton
- Chlorzoxazone
- Choke damp
- Cholagogues
- Cholebrine
- Cholecalciferol
- Cholecystokinin
- Cholera vaccine
- Choleretic
- Cholesterol-lowering agents
- Cholestyramine (resin)
- Cholic acid
- Choline
- Cholinergic (drug) NEC
- Cholinesterase reactivator
- Cholografin
- Chorionic gonadotropin
- Chromate
- Chromic
- Chromium
- Chromomycin A3
- Chromonar
- Chromyl chloride
- Chrysarobin
- Chrysazin
- Chymar
- Chymopapain
- Chymotrypsin
- Cianidanol
- Cianopramine
- Cibenzoline
- Ciclacillin
- Ciclobarbital
- Ciclonicate
- Ciclopirox (olamine)
- Ciclosporin
- Cicuta maculata or virosa
- Cicutoxin
- Cigarette lighter fluid
- Cigarettes (tobacco)
- Ciguatoxin
- Cilazapril
- Cimetidine
- Cimetropium bromide
- Cinchocaine
- Cinchona
- Cinchonine alkaloids
- Cinchophen
- Cinepazide
- Cinnamedrine
- Cinnarizine
- Cinoxacin
- Ciprofibrate
- Ciprofloxacin
- Cisapride
- Cisplatin
- Citalopram
- Citanest
- Citric acid
- Citrovorum (factor)
- Claviceps purpurea
- Clavulanic acid
- Cleaner, cleansing agent, type not specified
- Clebopride
- Clefamide
- Clemastine
- Clematis vitalba
- Clemizole
- Clenbuterol
- Clidinium bromide
- Clindamycin
- Clinofibrate
- Clioquinol
- Cliradon
- Clobazam
- Clobenzorex
- Clobetasol
- Clobetasone
- Clobutinol
- Clocortolone
- Clodantoin
- Clodronic acid
- Clofazimine
- Clofedanol
- Clofenamide
- Clofenotane
- Clofezone
- Clofibrate
- Clofibride
- Cloforex
- Clomethiazole
- Clometocillin
- Clomifene
- Clomiphene
- Clomipramine
- Clomocycline
- Clonazepam
- Clonidine
- Clonixin
- Clopamide
- Clopenthixol
- Cloperastine
- Clophedianol
- Cloponone
- Cloprednol
- Cloral betaine
- Cloramfenicol
- Clorazepate (dipotassium)
- Clorexolone
- Clorfenamine
- Clorgiline
- Clorotepine
- Clorox (bleach)
- Clorprenaline
- Clortermine
- Clotiapine
- Clotiazepam
- Clotibric acid
- Clotrimazole
- Cloxacillin
- Cloxazolam
- Cloxiquine
- Clozapine
- Coagulant NEC
- Coal (carbon monoxide from)
- Cobalamine
- Cobalt (nonmedicinal) (fumes) (industrial)
- Cobra (venom)
- Coca (leaf)
- Cocaine
- Cocarboxylase
- Coccidioidin
- Cocculus indicus
- Cochineal
- Codeine
- Cod-liver oil
- Coenzyme A
- Coffee
- Cogalactoiso-merase
- Cogentin
- Coke fumes or gas (carbon monoxide)
- Colace
- Colaspase
- Colchicine
- Colchicum
- Cold cream
- Colecalciferol
- Colestipol
- Colestyramine
- Colimycin
- Colistimethate
- Colistin
- Collagen
- Collagenase
- Collodion
- Colocynth
- Colophony adhesive
- Colorant
- Coloring matter
- Combustion gas (after combustion)
- Compazine
- Compound
- Congener, anabolic
- Congo red
- Coniine, conine
- Conium (maculatum)
- Conjugated estrogenic substances
- Contac
- Contact lens solution
- Contraceptive (oral)
- Contrast medium, radiography
- Convallaria glycosides
- Convallaria majalis
- Copper (dust) (fumes) (nonmedicinal) NEC
- Copperhead snake (bite) (venom)
- Coral (sting)
- Corbadrine
- Cordite
- Cordran
- Corn cures
- Cornhusker's lotion
- Corn starch
- Coronary vasodilator NEC
- Corrosive NEC
- Cortate
- Cort-Dome
- Cortef
- Corticosteroid
- Corticotropin
- Cortisol
- Cortisone (acetate)
- Cortivazol
- Cortogen
- Cortone
- Cortril
- Corynebacterium parvum
- Cosmetic preparation
- Cosmetics
- Cosyntropin
- Cotarnine
- Co-trimoxazole
- Cottonseed oil
- Cough mixture (syrup)
- Coumadin
- Coumaphos
- Coumarin
- Coumetarol
- Cowbane
- Cozyme
- Crack
- Crataegus extract
- Creolin
- Creosol (compound)
- Creosote (coal tar) (beechwood)
- Cresol (s)
- Cresyl acetate
- Cresylic acid
- Crimidine
- Croconazole
- Cromoglicic acid
- Cromolyn
- Cromonar
- Cropropamide
- Crotamiton
- Crotethamide
- Croton (oil)
- Crude oil
- Cryogenine
- Cryolite (vapor)
- Cryptenamine (tannates)
- Crystal violet
- Cuckoopint
- Cumetharol
- Cupric
- Cuprous sulfate
- Curare, curarine
- Cyamemazine
- Cyamopsis tetragonoloba
- Cyanacetyl hydrazide
- Cyanic acid (gas)
- Cyanide (s) (compounds) (potassium) (sodium) NEC
- Cyanoacrylate adhesive
- Cyanocobalamin
- Cyanogen (chloride) (gas) NEC
- Cyclacillin
- Cyclaine
- Cyclamate
- Cyclamen europaeum
- Cyclandelate
- Cyclazocine
- Cyclizine
- Cyclobarbital
- Cyclobarbitone
- Cyclobenzaprine
- Cyclodrine
- Cycloguanil embonate
- Cyclohexane
- Cyclohexanol
- Cyclohexanone
- Cycloheximide
- Cyclohexyl acetate
- Cycloleucin
- Cyclomethycaine
- Cyclopentamine
- Cyclopenthiazide
- Cyclopentolate
- Cyclophosphamide
- Cycloplegic drug
- Cyclopropane
- Cyclopyrabital
- Cycloserine
- Cyclosporin
- Cyclothiazide
- Cycrimine
- Cyhalothrin
- Cymarin
- Cypermethrin
- Cyphenothrin
- Cyproheptadine
- Cyproterone
- Cysteamine
- Cytarabine
- Cytisus
- Cytochrome C
- Cytomel
- Cytosine arabinoside
- Cytoxan
- Cytozyme